30pcs Knitting Crochet Locking Stitch Markers Holders Clip Craft Needle Plastic Material: Plastic Dimension: Approx 22 x 10mm/0.86 x 0.4inch (LxW) Can also be used as a nappy pin on a new baby greeting card Designed to hook into the knitted or crocheted stitch so it will not slip out. Good helpers for your stitching,help to make a marker when you are stitching, knitting or crocheting.